Tata docomo is Not In That Much Of Level Of Customers Because Its Signal Strength is Too Poor No One Like To Use Tata Docomo Sim.First thing This Sim Doesnt Work in all Android Mobile Its Only Works On few Of them And Work in Simple Keypad sets.i Buyed a Tata docomo sim When I Have an keypad Phone .i Buyed because of its Cheap call Rates & Recharges But Aftet Somtime Its Not Work Properly .Even I dnt think There are Manh Towers of Tata Docomo Near By My House.Even Not the No of needed One I guess thats The Reasom finding a singnal in My Phone is So dificult.Sometimes When You are talki g To someone and The Other person Stop Saying Anything And YoU think Whats Happend and than you will see No Signal Thats The Wrost part of this Sim.Even The Net Doesnt Work Proepery from this Sim.some Phone Doesnt Supports Its Net Settings Sometimes And When Its Comes to Start A Service it will Charge Too Much For even set a Caller tune its Just Cheap that time I Bought it Aftet that I never be Happy from its Signal And Service